I am stripping down and going through a 95 SR to make sure it is overland worthy and wont leave me stranded and I have realized that the lower intake plenum is the older part number that notoriously has issues. I looked at the bushings between cylinders that typically are the first to go, and it appears that a few are starting to crack a little. After doing some research I have found three main options to fixing this:
1. Purchase the 'updated' part for close to $500 (OUCH!)
2. Remove the butterfly valve assembly and seal up the plenum to prevent a vacuum leak
3. Figure out a way to replace bearing/bushings on the current plenum to prevent issues from occurring
These options bring me to a few questions:
1. Has anyone who has purchased the updated part had any similar issues with the new part or is it simply a one time fix?
2. How big of a difference in mileage & low end torque has anyone noticed that has removed the butterfly valve assembly?
3. Has anyone tried taking the old plenum to a machine shop (or doing this themselves) to get the bearing/bushings drilled out and replaced, and possibly get the butterfly valve discs welded to stem so they dont break off as easily?
Any ideas or advice is much appreciated.
-PT
1. Purchase the 'updated' part for close to $500 (OUCH!)
2. Remove the butterfly valve assembly and seal up the plenum to prevent a vacuum leak
3. Figure out a way to replace bearing/bushings on the current plenum to prevent issues from occurring
These options bring me to a few questions:
1. Has anyone who has purchased the updated part had any similar issues with the new part or is it simply a one time fix?
2. How big of a difference in mileage & low end torque has anyone noticed that has removed the butterfly valve assembly?
3. Has anyone tried taking the old plenum to a machine shop (or doing this themselves) to get the bearing/bushings drilled out and replaced, and possibly get the butterfly valve discs welded to stem so they dont break off as easily?
Any ideas or advice is much appreciated.
-PT